I have just registered with recording.org and am in desperate need of help! About six months ago I decided to revamp my studio and invest in a DAW of some type. My studio is only the size of a single garage with rockwool behind plasterboard walls, wood (laminate) floor and the recent addition of an Auralex alpha DST kit to help with acoustics. I play jazz guitar and want to record some good quality demos for solo jazz guitar, my jazz guitar duo and also my trio which has the addition of tenor sax. I did loads of research on the web and finally decided on a Carillon TI+ (http://www.carillondirect.com/clnweb/products.jsp?country=UK) which I was told would suit my purpose in that it would be quiet enough to record with mics in the same room. The TI+ was a new product and took quite a few months until it arrived. When the PC did arrive, it was extremely quiet and seemed like an excellent purchase until there was a problem with it turning itself off every now and again for no reason. I was sent a replacement which worked fine although was extremely noisy compared to the first one. The sound of the fans and airflow from the unit was way noisier than my desktop indoors which was an off the shelf Fujitsu Siemens PC of no great spec. Carillon apologised and agreed to send me their AC-1 D1 model as a replacement which is a monster compared to the TI+. I specifically asked if this unit would be quiet enough to have in the same room as my mics and they said that it would be no problem. When I received this third PC, it was also extremely noisy compared to the first one. The main noise is from the airflow coming from the vents although it seems to be audible from all round the unit. I decided to test the unit by setting up 2 Rode mics (NTK and NT1000) through my Firepod. I set the level so that my guitar was not clipping and recorded some stuff. As I expected, the Carillon PC could be heard very clearly on the recording even when I was set up at the far end of my studio. The recording meters in Sonar were about a quarter of the way up the scale with no other sounds other than the PC. What I am wondering is if anyone else out there has had the same problems with Carillon PCs or similar so called silent PCs. I was wondering after the second unit if it would be a good idea to send it all back and go for a Mac as they seem to be quiet. I obviously don't want to do the whole Mac vs PC thing but would this be an option? What I am really asking is what experiences people have had with a PC/Mac situated in the same room as mics when recording acoustic instruments. I play a seven string archtop jazz guitar through a Polytone amp. When recording, I have many options that I am going to try such as guitar direct into the firepod + two condensor mics on the guitar. However I get the best results, I will certainly need mics. Should I stick with the Carillon as it is an excellent spec machine for audio, put it in a rack and build some sort of cupboard around it to block out the sound or send it all back and try a different approach? I am completely stuck as to what to do now and anyone's help would be greatly appreciated!